The investigation of high quality single crystals offers the advantage of very reproducible and optimised
characteristics. In particular, the study of single crystals allows separating the extrinsic and intrinsic
properties such as to eliminate any contributions from grain boundaries to the transport properties.
For the study of anisotropic characteristics of a material (in non-cubic systems) the investigation of single
crystals is mandatory. The investigation of properties in k-space such as angle resolved photoemission or
neutron scattering also demand single crystalline samples. Mechanical properties such as breaking resistance
or linear extension, important aspects for the integration of materials in technical devices e.g. sensors, require
the measurement of single crystals. Thus, single crystals are important model systems to yield valuable
information about the potential for technical applications of a material. The method of choice for the
preparation of Heusler single crystals is the Travelling solvent floating zone technique (TSFZ).